BlackBoost Coolant Wide Open Thermostat for Mercedes-Benz S63 AMG (W221) M156 6.2L V8 (2006-2011) R6 JT Sprockets are manufactured the

JT Sprockets are manufactured the right way – by hobbing

we have achieved a reduction in drag by an additional 4

All products that leave the Akrapovic factory are meticulously tested in the Akrapovic labs using their own dynamometers to maintain a very high standard of quality control

Additional front padding on the arms and chest for enhanced roost protection

BlackBoost Coolant Wide Open Thermostat for Mercedes-Benz S63 AMG (W221) M156 6.2L V8 (2006-2011) R6 JT Sprockets are manufactured theBlackBoost Coolant Wide Open Thermostat for Mercedes Benz S63 AMG (W221) M156 6. 2L V8 (2006 2011) Racing Coolant Thermostat. With BlackBoost Racing Coolant Thermostat the coolant circulation with the radiator is always at 100% open. The factory coolant thermostat opens at 100C 212F. Only for racing application, not recommended be used under very cold weather conditions. Note : Prior to check out, please click here to confirm product availability,